otnmbrd wrote:
It's a "general" rule that boats with Korts tend to lose some backing
efficiency over their un-Korted brothers .....couldn't explain why
(whether it's the shape of the nozzle or design of the prop, or both)

Probably the nozzle- you could make the nozzle symmetrical, but it would
cost some efficiency in forward motion. The question is would it still
be more efficient than an un-nozzled prop.

A Z-drive or Azipod would be cool... no such thing as reverse, it's
always in forward! Just swivel the whole thing around just like a video
game.

Fresh Breezes- Doug King